9y-(7y-18)=28

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Solution for 9y-(7y-18)=28 equation:


Simplifying
9y + -1(7y + -18) = 28

Reorder the terms:
9y + -1(-18 + 7y) = 28
9y + (-18 * -1 + 7y * -1) = 28
9y + (18 + -7y) = 28

Reorder the terms:
18 + 9y + -7y = 28

Combine like terms: 9y + -7y = 2y
18 + 2y = 28

Solving
18 + 2y = 28

Solving for variable 'y'.

Move all terms containing y to the left, all other terms to the right.

Add '-18' to each side of the equation.
18 + -18 + 2y = 28 + -18

Combine like terms: 18 + -18 = 0
0 + 2y = 28 + -18
2y = 28 + -18

Combine like terms: 28 + -18 = 10
2y = 10

Divide each side by '2'.
y = 5

Simplifying
y = 5

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